My works 284 - 289

Juraj Lörinc
3196 Phénix 76 - 1999Notes: 920 Sent: 284

1.Qa3? zz
1...Kxc4 2.Qc5+ Rxc5#
1...Kxd4 2.Qxc3+ Sxc3#
1...g5!

1.Qg5! zz
1...Kxc4 2.Sd6+ Rxd6#
1...Kxd4 2.Qf4+ Sxf4#

This selfmate was composed originally for the same tourney as
my problem No. 224, but it was
less lucky, it didn't make it into award. I moved the paralysing
of both kings from 1st white move to black defences. But the result
wasn't very satisfying, probably more can be digged out of the
idea.

Again you can see the problem that is based on the same idea as my other problem,
in this case my problem No. 204.
As knight as a firing battery piece is less agile then queen, I had to use some
antibattery paralysing to achieve 6 mates, each of them paralysing another
pair of black defenders.

I was researching Vogtlaender chess for some time. After finding this 4-fold Reeves cycle on
the Dalmatian beach, in my head without board, I continued at home
and this my research culminated in the following No. 287.

Cycle of key and threat in 8 phases (8-fold Reeves cycle according to
new Peter Gvozdják's terminology) with further cycle key-mate after
different defences on threat squares. There are only kings, nightrider hoppers
and rookhoppers in diagram position, solo of WK! The strength of wK renders
Black powerless, moreover the variability of mates and refutations
of half of the thematical keys makes
the problem interesting enough to analyse.

This tourney asked for switchbacks by bith white and black. I managed to find
interesting scheme including transport of white locust that made
the first white move. Thus white locust made something like round trip - but only
two moves are actively made by them. Another interesting feature is that mate is given
by locust that doesn't move - his colleague takes black unit that prevents check and
also pins the other one. In my view a bit dry, schematical, but not the worst problem.

I wrote to editor: "In the set position Black threatens 1...Re2/Se2 2.Sf4#/Se5#.
Here you see a special kind of reflex-mate: the black mating moves must have two motives,
capture of wS guarding f1-c4 and guard of d5. To allow this, White must play checking
moves that appear reciprocally as forced white mates in the set play." Solvers commented
rather positively (CCF: A very good reflexmate with excellent play, AB: The unpinned wS moves
to three different squares). But I didn't publish this reflex mate long time bacause I wasn't
satisfied with economy (25 units for rather humble content...).